feat: Add @supabase registry to trusted registries

[ivasilov]

This PR adds Supabase registry to the trusted registries. Docs for the registry available at https://supabase.com/ui.

[vercel]

@ivasilov is attempting to deploy a commit to the shadcn-pro Team on Vercel.

A member of the Team first needs to authorize it.

[shadcn]

@ivasilov Looks like https://supabase.com/ui/r/registry.json is a 404. It needs to return a payload that implements the registry schema.

I have some docs here: https://ui.shadcn.com/docs/registry/registry-index